CN114477959A - Heat storage ceramic based on blast furnace slag and preparation method thereof - Google Patents
Heat storage ceramic based on blast furnace slag and preparation method thereof Download PDFInfo
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- CN114477959A CN114477959A CN202210258737.8A CN202210258737A CN114477959A CN 114477959 A CN114477959 A CN 114477959A CN 202210258737 A CN202210258737 A CN 202210258737A CN 114477959 A CN114477959 A CN 114477959A
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- 239000000919 ceramic Substances 0.000 title claims abstract description 79
- 238000005338 heat storage Methods 0.000 title claims abstract description 77
- 239000002893 slag Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000005245 sintering Methods 0.000 claims abstract description 43
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 29
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000654 additive Substances 0.000 claims abstract description 20
- 230000000996 additive effect Effects 0.000 claims abstract description 20
- 238000000465 moulding Methods 0.000 claims abstract description 20
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000292 calcium oxide Substances 0.000 claims abstract description 19
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 19
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 19
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 17
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052863 mullite Inorganic materials 0.000 claims abstract description 17
- 239000010453 quartz Substances 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 16
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 16
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920001778 nylon Polymers 0.000 claims abstract description 14
- 238000004898 kneading Methods 0.000 claims abstract description 13
- 239000000454 talc Substances 0.000 claims abstract description 13
- 229910052623 talc Inorganic materials 0.000 claims abstract description 13
- 235000012222 talc Nutrition 0.000 claims abstract description 13
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 13
- 239000000440 bentonite Substances 0.000 claims abstract description 10
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 10
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 10
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 22
- 238000001354 calcination Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 11
- 239000010425 asbestos Substances 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 10
- 229910052895 riebeckite Inorganic materials 0.000 claims description 10
- 239000011230 binding agent Substances 0.000 claims description 6
- 238000011068 loading method Methods 0.000 claims description 6
- 238000010907 mechanical stirring Methods 0.000 claims description 6
- 210000000056 organ Anatomy 0.000 claims description 6
- 238000009417 prefabrication Methods 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000002669 organ and tissue protective effect Effects 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000004146 energy storage Methods 0.000 abstract description 11
- 239000002994 raw material Substances 0.000 abstract description 5
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 239000012855 volatile organic compound Substances 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 239000012782 phase change material Substances 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/138—Waste materials; Refuse; Residues from metallurgical processes, e.g. slag, furnace dust, galvanic waste
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
The invention relates to a heat storage ceramic based on blast furnace slag and a preparation method thereof, wherein the heat storage ceramic comprises the following components in parts by weight: 11-25.3% of alumina, 1.3-5.6% of silicon carbide, 3-16.5% of magnesium oxide, 0-3.5% of quartz, 1-5.4% of calcium oxide, 1.1-3.5% of titanium dioxide, 1.5-3.1% of nylon fiber, 0.5-1.3% of talcum, 0-1.5% of bentonite, 0-10% of mullite, 0-13.1% of kaolin, 0-5.5% of auxiliary additive and the balance of blast furnace slag. The preparation method comprises two steps of mixing and kneading and sintering molding. Compared with the heat storage ceramic prepared by the traditional process, the porous honeycomb heat storage ceramic based on the blast furnace slag composite phase change material has the advantages of low production raw material cost, wide sources, simple production process, high production efficiency, high energy storage density, good heat conductivity, high mechanical strength, corrosion and abrasion resistance and the like, can efficiently absorb/release heat generated by combustion of VOCs, improves the heat storage and release rate by 30 percent and the energy storage density by more than 1 time, and solves the technical problems of slow heat storage and release and low energy storage density of ceramic materials.
Description
Technical Field
The invention relates to a heat storage ceramic based on blast furnace slag and a preparation method thereof, belonging to the technical field of high-temperature resistant materials.
Background
The heat storage ceramic has wide application in the fields of heat engineering, chemical industry, electronics, petroleum and the like, the current heat storage ceramic is obtained by adopting the traditional raw materials such as mullite, cordierite, alumina and the like, and through external force extrusion and sintering molding, although the use requirement can be met to a certain degree, the cost of the production raw materials is relatively high, the porosity and the pore diameter of the heat storage ceramic are in inverse proportion to the structural strength of the heat storage ceramic, so that the current heat storage ceramic product has relatively poor porosity and heat storage capacity, and the heat energy collection and release capacity is poor, thereby being difficult to effectively meet the requirement of practical use.
Therefore, in order to solve the problem, the development of a heat storage ceramic based on blast furnace slag and a preparation method thereof are urgently needed to meet the requirement of practical use.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the heat storage ceramic based on the blast furnace slag and the preparation method thereof, which can efficiently absorb/release heat generated by combustion of VOCs, improve the heat storage and release rate by 30 percent, improve the energy storage density by more than 1 time, and solve the technical problems of slow heat storage and release and low energy storage density of ceramic materials.
A heat storage ceramic based on blast furnace slag comprises the following components in parts by weight: 11-25.3% of alumina, 1.3-5.6% of silicon carbide, 3-16.5% of magnesium oxide, 0-3.5% of quartz, 1-5.4% of calcium oxide, 1.1-3.5% of titanium dioxide, 1.5-3.1% of nylon fiber, 0.5-1.3% of talcum, 0-1.5% of bentonite, 0-10% of mullite, 0-13.1% of kaolin, 0-5.5% of auxiliary additive and the balance of blast furnace slag.
Furthermore, the grain diameters of the alumina, the silicon carbide, the magnesia, the calcium oxide and the blast furnace slag are not more than 10-50 nanometers, and the grain diameters of the quartz, the mullite and the kaolin are 30-50 micrometers.
Furthermore, the diameter of the nylon fiber monofilament is 9-13 microns, and the mesh number is 300-400 meshes.
Furthermore, the auxiliary additive is any one or more of carbon powder, asbestos fiber and liquid solvent, and when the auxiliary additive is carbon powder, asbestos fiber and liquid solvent, the proportion of the carbon powder, the asbestos fiber and the liquid solvent is 1:0.5-2.5: 5-15.
A preparation method of heat storage ceramic based on blast furnace slag comprises the following steps:
s1, mixing and kneading, namely adding alumina, silicon carbide, magnesia, quartz, calcium oxide, titanium dioxide, talc, bentonite, mullite, kaolin, an auxiliary additive and blast furnace slag into kneading equipment for mechanical stirring, adding a high molecular binder into a mixture after uniformly stirring and mixing for secondary mixing and stirring to obtain a viscous fluid mixture, adding the viscous fluid mixture into a mold for prefabrication, oscillating for 5-10 minutes and standing for at least 60 minutes to obtain a heat storage ceramic blank;
s2, sintering and forming, namely adding the mold and the heat storage ceramic blank in the mold into a sintering furnace, and preheating for 5-10 minutes at the temperature of 150-260 ℃ and under the constant temperature environment with the air pressure 5-8 times of the standard atmospheric pressure; then raising the temperature to 600-800 ℃ at a constant speed under the condition of keeping the air pressure stable, and continuously calcining for 1-2.5 hours at a constant temperature; and finally, raising the temperature to 1000-1200 ℃ at a constant speed, synchronously reducing the calcining pressure to 0.3-0.8 times of standard atmospheric pressure, calcining for 2.5-4.5 hours in the environment, cooling to 150-260 ℃ along with the furnace, taking out the mold and the heat storage ceramic blank in the mold from the sintering furnace, simultaneously adding the subsequent mold to be sintered and the heat storage ceramic blank in the mold into the sintering furnace, performing subsequent sintering, naturally cooling the sintered ceramic blank and the mold taken out of the sintering furnace to normal temperature, cooling to normal temperature, and demolding to obtain the finished heat storage ceramic.
Further, the mold in S1 includes a carrying frame, a carrying tray, at least two plastic grooves, an oscillating base, guiding sliding grooves, driving chains, positioning blocks and a driving circuit, the carrying frame is a u-shaped groove structure in axial cross-section, the driving chains are embedded in the side walls of the carrying frame, symmetrically distributed on both sides of the axis of the carrying frame and vertically distributed with the bottom of the carrying frame, the driving chains are provided with a plurality of positioning blocks, and the positioning blocks are slidably connected with the side walls of the carrying frame through the driving chains, the carrying tray is a plate structure with a rectangular cross-section, the carrying trays are embedded in the carrying frame, distributed parallel to the bottom of the carrying frame and slidably connected with the side walls of the carrying frame through the positioning blocks, the upper end of the carrying tray is provided with a plurality of plastic grooves, the plastic grooves are a u-shaped groove structure in cross-section, and the lower end of each plastic groove is connected with the upper end of the carrying tray through the oscillating base, the oscillating base is mutually connected in parallel and is respectively electrically connected with the driving circuit, the lower end face of the molding groove is in sliding connection with the upper end face of the oscillating base through at least two guide sliding grooves, and the driving circuit is embedded on the outer side face of the bearing rack.
Further, the oscillating base comprises a bracket, a bearing spring, a bearing plate, an oscillating mechanism, elastic cushion blocks, an organ protective cover and a wiring terminal, wherein the bracket has a rectangular frame structure with an axial section, the lower end surface of the bracket is connected with the upper end surface of the bearing tray, the upper end surface of the bracket is connected with the bearing plate through a plurality of bearing springs uniformly distributed around the axis of the bracket, the bearing plate and the bracket are coaxially distributed, the oscillating mechanism is embedded in the bracket, coaxially distributed with the bracket and connected with the lower end surface of the bearing plate, the upper end surface of the bearing plate is uniformly distributed with a plurality of elastic cushion blocks uniformly distributed around the axis of the bearing plate and connected with the lower end surface of the molding groove through the elastic cushion blocks, the organ protective cover is a hollow cylindrical cavity structure coaxially distributed with the bracket, covers the bracket and the bearing plate and is respectively connected with the outer side surfaces of the bracket and the bearing plate, and a closed cavity structure is formed between the bracket and the bearing plate through the protective cover, at least one wiring terminal is embedded in the outer side surface of the bracket and is electrically connected with the oscillating mechanism and the driving circuit respectively.
Further, the interval is not more than 1.2 times of bracket height between terminal surface and the bracket bottom under the loading board, and is connected through two at least spacing springs between terminal surface and the bracket bottom under the loading board, terminal surface vertical distribution under spacing spring and the loading board to encircle and vibrate mechanism axis cladding outside vibrating mechanism.
Furthermore, the driving circuit is a circuit system based on a programmable controller.
Compared with the heat storage ceramic prepared by the traditional process, the porous honeycomb heat storage ceramic based on the blast furnace slag composite phase change material has the advantages of low production raw material cost, wide sources, simple production process, high production efficiency, high energy storage density, good heat conductivity, high mechanical strength, corrosion and abrasion resistance and the like, can efficiently absorb/release heat generated by combustion of VOCs, improves the heat storage and release rate by 30 percent, improves the energy storage density by more than 1 time, and solves the technical problems of slow heat storage and release and low energy storage density of ceramic materials.
Drawings
The invention is described in detail below with reference to the drawings and the detailed description;
FIG. 1 is a schematic view of a production process of the present invention;
FIG. 2 is a schematic structural view of a mold apparatus;
fig. 3 is a schematic structural diagram of the oscillating base.
The device comprises a bearing frame 1, a bearing tray 2, a molding groove 3, an oscillating base 4, a guide sliding groove 5, a driving chain 6, a positioning block 7, a driving circuit 8, a bracket 41, a bearing spring 42, a bearing plate 43, an oscillating mechanism 44, an elastic cushion block 45, an organ protection cover 46, a wiring terminal 47 and a limiting spring 48.
Detailed Description
In order to facilitate the implementation of the technical means, creation features, achievement of the purpose and the efficacy of the invention, the invention is further described below with reference to specific embodiments.
Example 1
As shown in figure 1, the heat storage ceramic based on the blast furnace slag comprises the following components in parts by weight: 11% of aluminum oxide, 1.3% of silicon carbide, 3% of magnesium oxide, 1% of calcium oxide, 1.1% of titanium dioxide, 1.5% of nylon fiber, 0.5% of talc and the balance of blast furnace slag.
In this embodiment, the particle sizes of the alumina, the silicon carbide, the magnesia, the calcium oxide and the blast furnace slag are not more than 10 nanometers.
Meanwhile, the diameter of the nylon fiber monofilament is 9 microns, and the mesh number is 300 meshes.
The specific preparation method comprises the following steps:
s1, mixing and kneading, namely adding aluminum oxide, silicon carbide, magnesium oxide, quartz, calcium oxide, titanium dioxide, nylon fiber, talc and blast furnace slag into kneading equipment for mechanical stirring, adding a high molecular binder into the mixture for secondary mixing and stirring after uniformly stirring and mixing to obtain a viscous fluid mixture, adding the viscous fluid mixture into a mold for prefabrication, oscillating for 5 minutes and standing for 60 minutes to obtain a heat storage ceramic blank;
s2, sintering and forming, namely adding the mold and the heat storage ceramic blank in the mold into a sintering furnace, and preheating for 10 minutes at 150 ℃ in a constant temperature environment with the air pressure being 8 times of the standard atmospheric pressure; then raising the temperature to 600 ℃ at a constant speed under the condition of keeping the air pressure stable, and continuously calcining for 2.5 hours at a constant temperature; and finally, raising the temperature to 1000 ℃ at a constant speed, synchronously reducing the calcining pressure to 0.8 times of the standard atmospheric pressure environment, calcining for 4.5 hours, cooling to 260 ℃ along with the furnace, taking out the mold and the heat storage ceramic blank in the mold from the sintering furnace, simultaneously adding the subsequent mold to be sintered and the heat storage ceramic blank in the mold into the sintering furnace, performing subsequent sintering, naturally cooling the sintered ceramic blank taken out of the sintering furnace and the mold to the normal temperature, and demolding after cooling to the normal temperature to obtain the finished product of heat storage ceramic.
Example 2
As shown in figure 1, the heat storage ceramic based on the blast furnace slag comprises the following components in parts by weight: 25.3% of alumina, 5.6% of silicon carbide, 16.5% of magnesium oxide, 3.5% of quartz, 5.4% of calcium oxide, 3.5% of titanium dioxide, 3.1% of nylon fiber, 1.3% of talc, 1.5% of bentonite, 10% of mullite, 13.1% of kaolin, 5.5% of auxiliary additive and the balance of blast furnace slag.
In this embodiment, the particle sizes of the alumina, the silicon carbide, the magnesia, the calcium oxide and the blast furnace slag are not more than 50 nanometers, and the particle sizes of the quartz, the mullite and the kaolin are 50 micrometers.
Wherein, the diameter of the nylon fiber monofilament is 13 microns, and the mesh number is 400 meshes.
Specifically, the auxiliary additive is carbon powder.
A preparation method of heat storage ceramic based on blast furnace slag comprises the following steps:
s1, mixing and kneading, namely adding alumina, silicon carbide, magnesia, quartz, calcium oxide, titanium dioxide, talc, bentonite, mullite, kaolin, an auxiliary additive and blast furnace slag into kneading equipment for mechanical stirring, adding a high molecular binder into a mixture after uniformly stirring and mixing for secondary mixing and stirring to obtain a viscous fluid mixture, adding the viscous fluid mixture into a mold for prefabrication, oscillating for 10 minutes and standing for 120 minutes to obtain a heat storage ceramic blank;
s2, sintering and forming, namely adding the die and the heat storage ceramic blank in the die into a sintering furnace, and preheating for 5 minutes at 260 ℃ in a constant temperature environment with the air pressure being 5 times of the standard atmospheric pressure; then, heating to 800 ℃ at a constant speed under the condition of keeping the air pressure stable, and continuously calcining for 1 hour at constant temperature; and finally, raising the temperature to 1200 ℃ at a constant speed, synchronously reducing the calcining air pressure to 0.3 times of the standard atmospheric pressure environment for calcining for 2.5 hours, then cooling to 150 ℃ along with the furnace, taking out the mold and the heat storage ceramic blank in the mold, simultaneously adding the subsequent mold to be sintered and the heat storage ceramic blank in the mold into the sintering furnace for subsequent sintering, naturally cooling the sintered ceramic blank taken out of the sintering furnace and the mold to the normal temperature, and demolding after cooling to the normal temperature to obtain the finished product of heat storage ceramic.
Example 3
As shown in figure 1, the heat storage ceramic based on the blast furnace slag comprises the following components in parts by weight: 18.5% of aluminum oxide, 3.6% of silicon carbide, 10% of magnesium oxide, 1.5% of quartz, 2.3% of calcium oxide, 1.8% of titanium dioxide, 2.5% of nylon fiber, 0.8% of talc, 0.5% of bentonite, 5% of mullite, 5% of kaolin, 2.5% of auxiliary additive and the balance of blast furnace slag.
In this embodiment, the particle sizes of the alumina, the silicon carbide, the magnesia, the calcium oxide and the blast furnace slag are not more than 30 nanometers, and the particle sizes of the quartz, the mullite and the kaolin are 40 micrometers.
Meanwhile, the diameter of the nylon fiber monofilament is 12 microns, and the mesh number is 380 meshes.
Furthermore, the auxiliary additive is shared by carbon powder and liquid solvent, and the ratio of the carbon powder to the liquid solvent is 1: 10.
A preparation method of heat storage ceramic based on blast furnace slag comprises the following steps:
s1, mixing and kneading, namely adding alumina, silicon carbide, magnesia, quartz, calcium oxide, titanium dioxide, talc, bentonite, mullite, kaolin, an auxiliary additive and blast furnace slag into kneading equipment for mechanical stirring, adding a high molecular binder into a mixture after uniformly stirring and mixing for secondary mixing and stirring to obtain a viscous fluid mixture, adding the viscous fluid mixture into a mold for prefabrication, oscillating for 8 minutes and standing for 70 minutes to obtain a heat storage ceramic blank;
s2, sintering and forming, namely adding the mold and the heat storage ceramic blank in the mold into a sintering furnace, and preheating for 8 minutes at 200 ℃ in a constant temperature environment with the pressure 6 times of the standard atmospheric pressure; then, the temperature is raised to 700 ℃ at a constant speed under the condition of keeping the air pressure stable, and the constant-temperature calcination is continuously carried out for 1.5 hours; and finally, raising the temperature to 1100 ℃ at a constant speed, synchronously reducing the calcining pressure to 0.5 times of the standard atmospheric pressure environment for calcining for 3 hours, then cooling to 230 ℃ along with the furnace, taking out the mold and the heat storage ceramic blank in the mold from the sintering furnace, simultaneously adding the subsequent mold to be sintered and the heat storage ceramic blank in the mold into the sintering furnace for subsequent sintering, naturally cooling the sintered ceramic blank taken out of the sintering furnace and the mold to the normal temperature, cooling to the normal temperature, and demolding to obtain the finished product of heat storage ceramic.
Example 4
As shown in figure 1, the heat storage ceramic based on the blast furnace slag comprises the following components in parts by weight: 20% of alumina, 3.1% of silicon carbide, 10.5% of magnesium oxide, 2.5% of quartz, 3.1% of calcium oxide, 2.8% of titanium dioxide, 2.1% of nylon fiber, 1.1% of talc, mullite, 8.1% of kaolin, 0-5.5% of auxiliary additive and the balance of blast furnace slag.
Furthermore, the grain diameters of the alumina, the silicon carbide, the magnesia, the calcium oxide and the blast furnace slag are not more than 30 nanometers, and the grain diameters of the quartz, the mullite and the kaolin are 40 micrometers.
Furthermore, the diameter of the nylon fiber monofilament is 10 microns, and the mesh number is 350 meshes.
Furthermore, the auxiliary additive is any one or more of carbon powder, asbestos fiber and liquid solvent, and when the auxiliary additive is the mixture of the carbon powder, the asbestos fiber and the liquid solvent, the ratio of the carbon powder to the asbestos fiber to the liquid solvent is 1:0.5-2.5: 5-15.
A preparation method of heat storage ceramic based on blast furnace slag comprises the following steps:
s1, mixing and kneading, namely adding alumina, silicon carbide, magnesia, quartz, calcium oxide, titanium dioxide, talc, bentonite, mullite, kaolin, an auxiliary additive and blast furnace slag into kneading equipment for mechanical stirring, adding a high molecular binder into a mixture after uniformly stirring and mixing for secondary mixing and stirring to obtain a viscous fluid mixture, adding the viscous fluid mixture into a mold for prefabrication, oscillating for 8 minutes and standing for 90 minutes to obtain a heat storage ceramic blank;
s2, sintering and forming, namely adding the die and the heat storage ceramic blank in the die into a sintering furnace, and preheating for 8 minutes at 230 ℃ in a constant temperature environment with the air pressure being 7 times of the standard atmospheric pressure; then, heating to 700 ℃ at a constant speed under the condition of keeping the air pressure stable, and continuously calcining for 2 hours at a constant temperature; and finally, raising the temperature to 1130 ℃ at a constant speed, synchronously reducing the calcining air pressure to 0.4 times of the standard atmospheric pressure, calcining for 3 hours in the environment, cooling to 180 ℃ along with the furnace, taking out the mold and the heat storage ceramic blank in the mold from the sintering furnace, simultaneously adding the subsequent mold to be sintered and the heat storage ceramic blank in the mold into the sintering furnace, performing subsequent sintering, naturally cooling the sintered ceramic blank taken out of the sintering furnace and the mold to the normal temperature, and demolding after cooling to the normal temperature to obtain the finished product of heat storage ceramic.
In the specific implementation of the invention, in order to better improve the forming efficiency and the forming quality of the finished heat storage ceramic product and assist the production process, the invention particularly relates to the following dies:
as shown in fig. 2-3, the mold in S1 includes a carrier frame 1, a carrier tray 2, a molding groove 3, an oscillating base 4, a guiding sliding groove 5, a driving chain 6, a positioning block 7 and a driving circuit 8, wherein the carrier frame 1 has a "u" shaped groove structure in axial cross section, at least two driving chains 6 are embedded in the side wall of the carrier frame 1, symmetrically distributed on two sides of the axis of the carrier frame 1 and vertically distributed with the bottom of the carrier frame 1, the driving chain 6 is provided with a plurality of positioning blocks 7, the positioning blocks 7 are slidably connected with the side wall of the carrier frame 1 through the driving chain 6, the carrier tray 2 has a rectangular plate structure in cross section, the carrier tray 2 is embedded in the carrier frame 1, is distributed parallel to the bottom of the carrier frame 1, and is slidably connected with the side wall of the carrier frame 1 through the positioning blocks 7, the upper end surface of the carrier tray 2 is provided with a plurality of molding grooves 3, the plastic grooves 3 are of U-shaped groove-shaped structures in transverse section, the lower end faces of the plastic grooves 3 are connected with the upper end face of the bearing tray 2 through the oscillating bases 4, the oscillating bases 4 are connected in parallel and are electrically connected with the driving circuit 8 respectively, the lower end faces of the plastic grooves 3 are connected with the upper end face of the oscillating base 4 in a sliding mode through at least two guide sliding grooves 5, and the driving circuit 8 is embedded in the outer side face of the bearing rack 1.
The oscillating base 4 comprises a bracket 41, a bearing spring 42, a bearing plate 43, an oscillating mechanism 44, an elastic cushion block 45, an organ shield 46 and a connecting terminal 47, wherein the bracket 41 is of a rectangular frame structure with an axial cross section, the lower end face of the bracket 41 is connected with the upper end face of the bearing tray 2, the upper end face of the bracket is connected with the bearing plate 43 through a plurality of bearing springs 42 uniformly distributed around the axis of the bracket 41, the bearing plate 43 and the bracket 41 are coaxially distributed, the oscillating mechanism 44 is embedded in the bracket 41, coaxially distributed with the bracket 41 and connected with the lower end face of the bearing plate 43, a plurality of elastic cushion blocks 45 uniformly distributed around the axis of the bearing plate 43 are uniformly distributed on the upper end face of the bearing plate 43 and connected with the lower end face of the molding groove 3 through the elastic cushion blocks 45, the organ shield 46 is of a hollow cylindrical cavity structure coaxially distributed with the bracket 41, covers the bracket 41 and the bearing plate 43 and is respectively connected with the bracket 41, The outer side surfaces of the bearing plates 43 are connected, the bracket 41 and the bearing plates 43 form a closed cavity structure through an organ protection cover 46, and at least one wiring terminal 47 is embedded in the outer side surface of the bracket 41 and is electrically connected with the oscillating mechanism 44 and the driving circuit 8 respectively.
Further preferably, the distance between the lower end surface of the bearing plate 43 and the bottom of the bracket 41 is not greater than 1.2 times the height of the bracket 41, the lower end surface of the bearing plate 43 is connected with the bottom of the bracket 41 through at least two limiting springs 48, the limiting springs 48 are vertically distributed with the lower end surface of the bearing plate 43, and surround the axis of the oscillating mechanism 44 to cover the oscillating mechanism 44.
The drive circuit 8 is based on a circuit system based on a programmable controller.
When the utility model is operated, firstly, the quantity of the bearing tray 2 and the molding groove 3 is adjusted according to the requirement of production operation, then each molding groove 3 is arranged on the bearing tray 2 through a guide sliding groove 5 and is arranged on a positioning block 7 along with the bearing tray 2 and is positioned at the upper end surface of the bearing frame 1, then the viscous fluid mixture is added into the molding groove 3, and after the molding groove 3 is finished, the current bearing tray 2 is lowered into the bearing rack 1 by the matching of the driving chain 6 and the positioning block 7, meanwhile, the plastic groove 3 to be filled after the assembly is installed to the upper end surface of the bearing frame 1 along with the bearing tray 2, and the plastic groove 3 is filled again until the filling operation of all the plastic grooves 3 is completed, then, the filled molding groove 3 is vibrated through the vibration base 4, and the distribution uniformity of all components in the viscous fluid mixture is improved through vibration; on the other hand, air bubbles in the viscous fluid mixture in the molding groove 2 are eliminated, so that the quality of the ceramic product is improved.
During sintering, each molding groove 3 is taken out from the bearing tray 2 and is installed in a sintering furnace for sintering, during sintering operation, carbon powder, asbestos fiber and liquid solvent in the auxiliary additive are combusted and gasified in a high-temperature state, porosity during sintering and forming of the heat storage ceramic is further improved, and meanwhile, gas emission phase rate is further improved through a negative pressure environment during sintering operation, so that the quantity of micropores in the ceramic is increased, the porosity is improved, and the heat storage capacity of the heat storage ceramic is further improved while the density of the heat storage ceramic is reduced by improving the porosity.
Compared with the heat storage ceramic prepared by the traditional process, the porous honeycomb heat storage ceramic based on the blast furnace slag composite phase change material has the advantages of low production raw material cost, wide sources, simple production process, high production efficiency, high energy storage density, good heat conductivity, high mechanical strength, corrosion and abrasion resistance and the like, can efficiently absorb/release heat generated by combustion of VOCs, improves the heat storage and release rate by 30 percent, improves the energy storage density by more than 1 time, and solves the technical problems of slow heat storage and release and low energy storage density of ceramic materials.
The foregoing shows and describes the general principles, broad features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. A heat storage ceramic based on blast furnace slag is characterized in that: the heat storage ceramic based on the blast furnace slag comprises the following components in parts by weight: 11-25.3% of alumina, 1.3-5.6% of silicon carbide, 3-16.5% of magnesium oxide, 0-3.5% of quartz, 1-5.4% of calcium oxide, 1.1-3.5% of titanium dioxide, 1.5-3.1% of nylon fiber, 0.5-1.3% of talcum, 0-1.5% of bentonite, 0-10% of mullite, 0-13.1% of kaolin, 0-5.5% of auxiliary additive and the balance of blast furnace slag.
2. The blast furnace slag-based heat storage ceramic according to claim 1, wherein: the grain diameters of the alumina, the silicon carbide, the magnesium oxide, the calcium oxide and the blast furnace slag are not more than 10-50 nanometers, and the grain diameters of the quartz, the mullite and the kaolin are 30-50 micrometers.
3. The blast furnace slag-based heat storage ceramic according to claim 1, wherein: the monofilament diameter of the nylon fiber is 9-13 microns, and the mesh number is 300-400 meshes.
4. The blast furnace slag-based heat storage ceramic according to claim 1, wherein: the auxiliary additive is any one or more of carbon powder, asbestos fiber and liquid solvent, and when the auxiliary additive is the carbon powder, the asbestos fiber and the liquid solvent, the proportion of the carbon powder, the asbestos fiber and the liquid solvent is 1:0.5-2.5: 5-15.
5. The preparation method of the heat storage ceramic based on the blast furnace slag is characterized by comprising the following steps of:
s1, mixing and kneading, namely adding alumina, silicon carbide, magnesia, quartz, calcium oxide, titanium dioxide, talc, bentonite, mullite, kaolin, an auxiliary additive and blast furnace slag into kneading equipment for mechanical stirring, adding a high molecular binder into a mixture after uniformly stirring and mixing for secondary mixing and stirring to obtain a viscous fluid mixture, adding the viscous fluid mixture into a mold for prefabrication, oscillating for 5-10 minutes and standing for at least 60 minutes to obtain a heat storage ceramic blank;
s2, sintering and forming, namely adding the mold and the heat storage ceramic blank in the mold into a sintering furnace, and preheating for 5-10 minutes at the temperature of 150-260 ℃ and under the constant temperature environment with the air pressure 5-8 times of the standard atmospheric pressure; then raising the temperature to 600-800 ℃ at a constant speed under the condition of keeping the air pressure stable, and continuously calcining for 1-2.5 hours at a constant temperature; and finally, uniformly heating to 1000-1200 ℃, synchronously reducing the calcining pressure to 0.3-0.8 times of the standard atmospheric pressure environment for calcining for 2.5-4.5 hours, then cooling to 150-260 ℃ along with the furnace, taking out the mold and the heat storage ceramic blank in the mold from the sintering furnace, simultaneously adding the subsequent mold to be sintered and the heat storage ceramic blank in the mold into the sintering furnace for subsequent sintering, naturally cooling the sintered ceramic blank and the mold taken out of the sintering furnace to the normal temperature, and demolding after cooling to the normal temperature to obtain the finished product of heat storage ceramic.
6. The method for preparing a heat-accumulating ceramic based on blast furnace slag according to claim 5, wherein: the mould in S1 comprises a bearing rack (1), a bearing tray (2), a molding groove (3), an oscillating base (4), a guide sliding groove (5), a driving chain (6), positioning blocks (7) and a driving circuit (8), wherein the bearing rack (1) is of a U-shaped groove-shaped structure in the axial section, at least two driving chains (6) are embedded in the side wall of the bearing rack (1) and are symmetrically distributed on two sides of the axis of the bearing rack (1) and are vertically distributed with the bottom of the bearing rack (1), a plurality of positioning blocks (7) are arranged on the driving chain (6), the positioning blocks (7) are slidably connected with the side wall of the bearing rack (1) through the driving chain (6), the bearing tray (2) is of a plate-shaped structure with a rectangular cross section, the bearing trays (2) are embedded in the bearing rack (1) and are distributed in parallel with the bottom of the bearing rack (1), and through locating piece (7) and bear frame (1) lateral wall sliding connection, bear tray (2) up end and establish a plurality of moulding groove (3), moulding groove (3) are "U" font slot-shaped structure for the cross-section, and under each moulding groove (3) the terminal surface all through oscillating base (4) with bear tray (2) up end and be connected, oscillating base (4) are parallelly connected each other and respectively with drive circuit electrical connection, and under moulding groove (3) terminal surface and oscillating base (4) up end between through two at least direction spout (5) sliding connection in addition, drive circuit (8) inlay in bearing frame (1) lateral surface.
7. The method for preparing a heat-accumulating ceramic based on blast furnace slag according to claim 6, wherein: the vibration base (4) comprises a bracket (41), a bearing spring (42), a bearing plate (43), a vibration mechanism (44), an elastic cushion block (45), an organ protective cover (46) and a wiring terminal (47), wherein the bracket (41) is of a rectangular frame structure with an axial section, the lower end face of the bracket is connected with the upper end face of the bearing tray (2), the upper end face of the bracket is connected with the bearing plate (43) through a plurality of bearing springs (42) uniformly distributed around the axis of the bracket (41), the bearing plate (43) and the bracket (41) are coaxially distributed, the vibration mechanism (44) is embedded in the bracket (41), coaxially distributed with the bracket (41) and connected with the lower end face of the bearing plate (43), a plurality of elastic cushion blocks (45) uniformly distributed around the axis of the bearing plate (43) are uniformly distributed on the upper end face of the bearing plate (43), and connected with the lower end face of the plastic groove (3) through the elastic cushion blocks (45), the organ protection cover (46) is a hollow cylindrical cavity structure which is coaxially distributed with the bracket (41), covers the bracket (41) and the bearing plate (43) and is respectively connected with the outer side surfaces of the bracket (41) and the bearing plate (43), a closed cavity structure is formed between the bracket (41) and the bearing plate (43) through the organ protection cover (46), and at least one wiring terminal (47) is embedded in the outer side surface of the bracket (41) and is respectively electrically connected with the oscillating mechanism (44) and the driving circuit (8).
8. The method for preparing a heat-accumulating ceramic based on blast furnace slag according to claim 7, wherein: the interval is not more than 1.2 times of bracket (41) height between terminal surface and bracket (41) bottom under loading board (43), and is connected through two at least spacing springs (48) between terminal surface and bracket (41) bottom under loading board (43), spacing spring (48) and the terminal surface vertical distribution under loading board (43) to encircle oscillating mechanism (44) axis cladding outside oscillating mechanism (44).
9. The method for preparing a heat-accumulating ceramic based on blast furnace slag according to claim 7, wherein: the drive circuit (8) is based on a circuit system based on a programmable controller.
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